I've been helping run a site for quite some time (since the beginning of this year). We only ran across a single member that gave us much trouble, and we've since attempted to reconcile with him, only to find a warning from said trouble-maker that a troll was coming to our site.The troll has sent threatening PMs to a specific administrator, our only female one, insulting her with vulgarity and threatening to spam our forum with "goatse" while the administration isn't online so we can't do anything about it. And he has gone around attempting to do so. We have now, no new member flow as the only way to stop him so far has been to stop the creation of new member accounts. We'd like to be able to safely turn on the member creation without having to worry about a troll spamming our site until we "are forced to shut down the site" in his own words in the threats he sent.The site I help run is http://lostgenerations.darkbb.com